Odd Rattle from Exhaust?

[bmatt]

So I have a CJ Pony Parts H-pipe and a catch can, but otherwise everything is stock on my car. The other day I was riding through my parking garage at work and I noticed around turns, with low RPM and generally on the engine winding down I have this odd rattle noise. I'd describe it kind of like a heat shield rattle maybe? Hollow like metallic sound. For all I know it may have always been there, I was listening more than normal when I noticed it because I had bumped up against a curb that morning (just scraping my rear rim a little :frusty.

Anyhow, I backed my car out of my garage this morning and left it running to look around a bit to see if i could figure out where it is coming from, my first assumption is something to do with the H-pipe and cut and clamp system. I look there and everything looks OK, sounds OK when throttling up the engine and idle. I do see some moisture coming out of the clamps, and I see some at the clamps from the cats as well. Not sure if that is normal or not, maybe needs a little torquing on the bolts so I'll probably get that done.

I was laying on the ground and pressing the gas pedal with my hand a little to see if I could replicate it, but I may have barely heard it once or twice, sounds pretty normal overall. I wish I could capture the sound, I tried to pull my dashcam video without the stereo on but it doesnt really register there either. Anyone else know what this could be, or maybe it is normal?

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[jasonstang]

Tighten the clamps and see if the rattle comes back.

 

[Slemers]

After I had exhaust work done on my EB I had issues with a rattle occasionally on the right side of the car. I was convinced it was the muffler delete and magnaflow install. Turns out it was the passenger seat belt buckle on the door trim.

 

[MagnaFlow]

Best thing to do would be to jack the car up/put on a lift and check the clearance around the pipes from from to back. There's a good chance its either something loose, or a heat shield. When the car is hot, the pipes expanding from heat combined with the normal play in hangars etc can be enough to come into contact with the body or a heat shield.

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